Senegalia Species, Knob Thorn (Senegalia nigrescens)

by palmbob Mar 28, 2009 4:08 AM

by poppysue Feb 23, 2009 5:47 PM

by poppysue Feb 23, 2009 5:48 PM

tree early spring, southern California

by palmbob Mar 28, 2009 4:07 AM

by palmbob Mar 28, 2009 4:08 AM

curious huge, flattened, stair-step like 'thorns' sparsely spread along trunk, getting larger and larger the higher up the trunk you go

by palmbob Mar 28, 2009 4:09 AM

upper trunk

by palmbob Mar 28, 2009 4:10 AM